SiPh 400G QSFP-DD LR4 CWDM4 10km SMF LC Optical Transceiver

FIBERSTAMP’s silicon-based 400G QSFP-DD LR4 optical transceiver is tailored for mid-to-long-range data center connections. It aligns with 100G Lambda MSA 400G-LR4-10 standards and IEEE 802.3cu 400GBASE-LR4 Ethernet protocol. This module integrates a 4-channel CWDM MUX and DEMUX with central wavelengths at 1271nm, 1291nm, 1311nm, and 1331nm, enabling distances of up to 10km (FEC enabled) through a pair of single-mode optical fibers


  • An integrated full-duplex transceiver module employing QSFP-DD hot-pluggable form factor.
  • Transmitters and receivers designed with a 4-channel CWDM silicon optics.
  • Each channel supports a maximum transmission rate of 106.25Gbps (100G PAM4).
  • Compliant with QSFP-DD MSA and 100G Lambda MSA 400G-LR4-10 specifications.
  • Compatible with IEEE 802.3cu 400GBASE-LR4 Ethernet transmission protocols.
  • Utilizes a pair of single-mode optical fibers, reaching distances up to 10km (FEC enabled).
  • Power consumption less than 11W.
  • Dual LC optical ports.
  • Operates within a commercial-grade temperature range.
  • Operating voltage of 3.3V.
  • Complies with RoHS environmental standards (lead-free).
P/N & Data Sheet Description
FTL-400C4K10C SiPh 400G QSFP-DD LR4 CWDM4 10km Optical Transceiver

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